Sparking plug for explosive-engines.



JONES. SPARKINGl PLUG FOR EXPLOSIVE ENGINES.

v APPLIQATIU rmm `nrovfi, 190s.

' Patented .my 26.

Inl/enfer.'

To all whom it may concern:

UNTTED STATES PATENT OFFICE.

,cYRUs F. Jones, or OREGON, 'ILLINoIs SPARKING PLUG FQREXPLOSVE-ENGINES.

-lmprovements in Sparking Plugs for EX- plosive-Engines, ofv which thefollowing is a specification.

My invention relates to sparking devices for explosive engines, and morespecifically y to that'class'i` fof the saine commonly known as sparkingplugs.

The objectofmy invention yis to provide a plug ofthe character.mentioned, which will be especially applicable to vgasolene engines,

and one which will-.beef such improved construction as 'to bei-adaptedtopbe readily and easily attached thereto or detached there- A. furtherobjectof'fmy. invention is to -p rovide a deviceofsthe charactermentioned,

' consists in a plug characterized as above mentioned, and 1n certaindetails of construction and arrangement of parts allas will behereinafter more fully described and 'particularly pointed o'ut'in theclaim.

My invention will be more readily understood by reference ytotheaccompanying drawings forming apart `of this specifica-K` tion, and inwhich,

Figure 1 isa side elevation of my device in its preferred form, Fi' L, 2is a central longitudinal section the'reo Fig 3 is a side lelevation ofthe` sparking,` plug proper re-A moved from the plug sleeve, Fig, l1f 1sa top plan view thereof, Fig'.4 y5- is' aI perspective view of the plugrsleeve', the plug proper be- 'ing removed, andFig. 61s a top plan viewthereof. p Referring now to the drawings, my device -I comprises a plugproperjl, and a sleeve 2 therefor, thelatter beingI preferably formed ofsteel, although it may be formed'of any other suitable metal. Inthe plugproper 1, 3 indicates a metal conducting rod and 4 an insulating coatingtherefor, the latter be-l ing formed ofany' suitable material, but

, preferably ofk porcelain', glass, orl wood.

5 indicates a metal disk, preferably of steel, the same being' of adiameter slightly less than that of the `insulating coating 4;.

Specification of Letters Patent.

Application filed November 4, 1998. Serial No. 461,064.

Patented July 26, 1910.

'Said disk is fixed in any suitable manner, but preferably threaded uponthe lower extremity of therod 3. Threaded upon the upper extremity ofsaid rod 3, is a lock-nut 6 serving an obvious purpose, and abinding-nut 7 for a purpose hereinafter described. Fixed, preferably bybeing pressed thereon, upon the outer surface of said insulating coating4, and preferably positionedthereon at substantially the central portionthereof, is a metal coatingor sleeve 8. Said coating 8 is provided uponits outer surface, at points diametrically opposite each other, withradially extending projecting pins 9. The lower edge 10 of said. coating8, is preferably beveled, as clearly shown in'Figl 2 of the accompanyingdrawings.

The lower portion 11 of the'sleeve 2, is provided with a male thread,and the outer surfaceof said sleeve is formed hexagonal as4 at 12 adating said member to be screwed into, hence Xed-in an engine casing. Theinside diameter of the upper portion of said' sleeve 2, is substantiallythe same as, or slightly greater than, as the outside'diamcter of thecoating 8 of the plug proper, that is, said coating 8 is adapted to fitsnugly within the upper portion of the sleeve .'mernber 2. The insidediameter of the lower end ortion 10 of said sleeve 2, is slightly lessthan that ofthe upper portion thereof, the annular shoulder 13 therebyformed being preferably obliquelydisposed at the same angle as the loweredge 10 of the coating 8 of the plug member 1, hence, makin 1t possiblewhen the'latter is inserted in' t e Sleeve' member 2 to form an airtightconnection between saidshoulder 13 with said lower edge lO'of the.

member 1. Arranged diametrically op os'ite each other in the walls ofsaid vmem er 2, close to the upper edge thereof, are obliq'uelyr.disposed slots 14.4 Longitudinally disposed passages 15, provided inthe inside surface of said'sleeve, and'extending from the upperextremities of said slots 14, establish. com-l munication with the uper. edge of the sleeve 2, as clearly shown in gig. 5.

In attaching the plug proper to an engine provided with a sleeve member2,hence' attaching the same in said sleeve 2, lsaid plug proper isinserted in said/sleeve so that the pins 9 thereof shall engage, thatis, pass through the passages 15, whence'tliey enter the slots,14. Saidpins 9 are sopositioncd on the member 1 and the slots vlil in the parts,by,l lcontact of the.

member 2 that a partial rotation of the vmember 1, causes the beveledlower ed e of the coating 8 thereof to be forced own or other electricalenergizing means, byl

means of the binding-nut 7. An *automat-v ically operated make and breakmechanism beinginte'rposed between the plug and the energizing means, itis obvious that as connections are made, sparks will jump from theperiphery of the metal disk meinber',

which forms the anode to the adjacent walls ofthe plug sleeve 2,whichforms the cathode, hence, causing explosion of the explosive mixture inthe engine.

By the provision in -an engine of a spark- I'ing plug as described, itis obvious that the plug proper may be readily and easily re- 30 movedfrom the plug sleeve, that is, from the engine, and may -justas easilyandv quickly be replaced therein, resulting in numerous advantages knownto any one with the slightest knowledge ot explosive engines.

While I haveshown what I deem to be` Ithe preferable form of my device,I do not wish to be limited thereto as there might be many changes madein the details lof construction andarrangements of parts withoutdeparting `crom the spirit of my invention.

Having described my invention. what I claim as new and desire to secureby Letters Iatent, is

In a tw'o-partsparking plug, a cathodeforming sleeve comprising acylindrical member having its central portion squared to form aWrench-hold, the lowerr end of said member being externally threaded,the i l bore of said member being reduced in diameter toward the' lowerend forming a conical shoulder, an anode-forming lug roper def tachablysecured in said p u s eeve, said plug proper comprising a cy lndricalelon-l j.

ated member formed of insulating material avin a uniform cross sectionof ss diam eter t an the smallest' diameter of said sleeve, saidinsulating; member extending4 considerably above said cathode-forming'sleeve and terminating wit-hin .and at av distance from the inner endthereof, a central rod extending entirely through said cylindricalmember, a metal disk threaded i upon the lower end of said rod andbearing against the lower end of saidv member, a

lock nut threaded upon the upper. end

vthereof and a binding screw also upon said upper end, a metal jacketsecured about the -Y central portion vof Said member and adaptedto litloosely within the upper end of said4 )lug sleeve, the lower end of saidjacket eilig formed lto fit upon -said conical shoulder, oppositelydisposed rods extending radially from said jacket, the inner surface' ofsaid sleeve heilig provided Vwith obliquely disposed slots in its up erportion to receive said rods, whereby said 7 5 ,v plug and its jacketmay4 be readily i'emoveclwitlioiit loosening j or removing any .otherpart or parts of the device and whereby when iii position a tight 8O i.d

fit is maintained between'the parts at.sa1 conical shoulder,substantially as described.

In testimony whereof I have signed'my name' to this'specitic'ation inthe presence` of two subscribing witnesses.

crans F. Joules4 `v Witnesses: j

. H. H. Toon, v

GLENN EDELMAN.

